Hammer



A AYVAD HAMMER Original Fi led Oct. 26, 1925 Inventor; Hachlg A Attarmy,

' helve being'indicated in dotted lines;

Fig. 2 is an elevation of the hammer head;

Patented Au gl 26, A

UNITED. STATES PATENT o JFicE} nncnre A Axvnnorwns'r niawxonxfnnwJERSEY" V HAMMER Application fiIed October 26, 1925, Serial No. 64,786.Renewed January 6,1928.

The object of this invention is to provide a claw hammer with manifoldfeatures which are useful particularly for those who are engaged in theopening and closing of boxes for the packing and shipping of goods, andfor others who may need atool with a wider range of usefulness than theusual type of clawhammer. A further object is to impart bal ance to thehammer by providing beyond the line of the face sufiicient weight sothatits p poll from the hammer face isa curved nailmomentum willsubstantially balance the momentum of the handle, and when striking ablow the momentum of substantially the entire hammer will be absorbed atthe point where the blow is delivered and none will be transmitted tothe hand so that the hand will be? relieved of. all shock; Other objectsare to provide a hammer which is suitable for extracting nails of aconsiderable range of sizes and from a position,v as in a corner, whichis inaccessible to a clawofthe usual. types A further obj ectistoprovide means for bendmg a. nail from which the head has 'brokenoff so'that it can be engaged by the claw and extracted. A further object'is'to provide a hammer by which a nail may be completely extractedinone operation even when of such length that with a claw hammer of theusual type a block would need to be set under the hammer after partialextraction. A further object is-to provide. a hammer with achisel edgetransverse to the axis of thefeye through the poll and suitably disposedfor use in trimming the edge of a board or for use asa scraper forremoving oldinarkmgs.

In the accompanying sheet of drawings which forms a part ofthisdescription,

. Fig. 1 is a perspective of a hammer head embodying this, invention, aportion of the and A I 1 1 Fig; 3 is a longitudinal section through thehammer head.v V W I The hammer head comprises the customary .poll 10which is elongated and the eye through b I ox.

which is tapered slightly towithin three quarters of" an inch of theouter end from which point it is fiared slightly; In the sides of thisflared portion are grooves 11 which fulcrum shoulder13' about which thehammer when set against a board for the purposeof ullinga nail. 7 On theopposite side of the can be rocked through a considerable angle engagingport-ion 14 whichprojects from 'the poll at its outer end wholly beyondthe axis X--X of the face, and it is not curved as much as the usualclaw of a claw-hammer so that the major part of the weight whichitaddsto the hammerhead is beyond the axis of the face and its momentumserves to balance themementum ofjthe handle to such an extent that.none'ofthe shock of arresting themotion as a" weigh-tbeyond the axisofthe face is not suf rnail is'stru ck will be felt by the hand. This]:fi'cient to balance the weight of the handle and V bring the center ofgravity into the axis, for what is requlred is to balance the momentum,

which for any part is measured by the prodnot of the "weight of the.part multiplied by r I the square of itsvelocity, Ahamm'er in strikmg ablow traversesa curvedpath so that its outer portion has aconsiderablevelocity com:v paredlwit'h the handle and brings the pointof momentumbalance, known as the center of I percussion,.sufliciently'close to theaxis of the 1 face to eliminate shockto the hand.

A ichi's'e'l edge 15. is. provided at the Ou er end of the curvednail-engaging portion and e the eye through the. poll. Since thecurvature of the nail-engaging portion is less than i V is customary,and preferably limited aswshown to approximately forty-five degreesythis chisel edge is in a suitable direction for chipping away the edge,of a board suchjasthetongue or groove at the side of-a box when thecover, afterhaving'been nailedon, v is found toproject beyond, the edgeofthe this edge is transverse tothe axis Y-Y- of" I I Provision is madefor nail extraction with-' ,o'ut' breaking the chisel edge, by thenaiL'engagingnotchof thefusual'claw. Instead a slot 16 is provided in thecurved portion.

This slot has an enlarged portion 17 near the end remote from the pollwhich is sufficient for any ordinary nail head to pass therethrough.From this opening the sides converge toward the poll and make an acuteangle with the upper face after the manner of the usual claw so that theshank of a nail can be engaged. under the head for extraction, but thesides do not come together at a point and the heads of small nails andbrads cannot be engaged. Instead the sides run into an eye 18 at the endnearest the poll. This eye is large enough to receive the shank of anail when the head has been broken off and affords a means for engagingand bending over the shank so that it can be taken hold of andextracted. From the main enlarged portion the sides of the slot convergeto a point 19 away from the poll to provide a means for engaging andextracting small nails and brads. All of these instrnmentalities forextracting nails are part of one unitary slot for convenience ofmanufacture and so that the forming dies may be of a rugged character.

In addition to the central curved nail-- engaging portion there arenail-enga ing side claws 20 in which the outer sides 0 the 30 claws areflush with and protected by the sides of the central nail-engagingportion beyond the points of the claws, so that when the hammer is laiddown these claws will not scratch the surface on which it is laid. Theseare provided for extracting nails from walls at points close to floors,or from floors close to walls and from similar confined places Where thenails are inaccessible to the other means for extraction.

0 I claim,-

In a hammer, the combination with a helve-receiving poll, of a curvednail-head engaging portion terminating in a chisel edge notched at thesides to form nail-engaging side claws in which the outer sides of theclaws are protected by the sides of the curved nail-engaging portion andthe chisel eilge is beyond the notches for the side 0 aws.

5a HACI-IIG A AYVAD.

